And then he's going to see the wasteland that was the high energy lab and freak out, because that was supplying the coffee system.

Not as bad as you think.

I suspect Doc may have a decent source of synchrotron radiation. throw in the wormholes as aiming elements & with proper protection, parts of the lab along the discharge path are survivable for several minutes at a time. The target area...OTOH, isn't there anymore. (unless Roger was playing with wormholes & time and at that point...I dunno)